Energetic particle physics in JT-60U and JFT-2M

K. Shinohara, M. Takechi, M. Ishikawa, Y. Kusama, K. Tsuzuki, K. Urata, H. Kawashima, K. Tobita, A. Fukuyama, C. Z. Cheng, D. S. Darrow, G. J. Kramer, N. N. Gorelenkov, R. Nazikian, Y. Todo, Y. Miura, T. Ozeki

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Recent energetic particle physics research in JT-60U and JFT-2M is reported. Alfvén eigenmodes (AEs) are investigated in reversed-shear (RS) plasmas in JT-60U where frequency sweeping (FS) modes are observed to follow the q-profile evolution. The RS-induced AE model can explain the FS of the modes within the context of an evolving q-profile. Enhanced energetic ion transport is also investigated with the appearance of modes in the toroidicityinduced AE range of frequency in JT-60U using a multi-channel neutron profile monitor and in JFT-2M using a lost ion probe. Additionally, the ripple loss in the complex toroidal field ripple due to ferritic steel inserts in JFT-2M is shown and compared with model analysis. The simulation code developed to predict ripple loss in JFT-2M will be of use in estimating the heat flux in the complex ripple field of a future device such as ITER.

Original languageEnglish
Pages (from-to)S31-S45
JournalPlasma Physics and Controlled Fusion
Volume46
Issue number7
DOIs
Publication statusPublished - 2004 Jul 1
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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